Extensible shutter



May 17, 1932. E. BOLARD 1,858,801

EXTENSIBLE SHUTTER Filed April 50, 1931 3 Sheets-Sheet l a 4 fig 5 4 A n gfg/j /y/m/k/ Ly uu uu uu uu uu uu uu J 2" 7 x\\\\\\\ \\\\\\mmmxmmmxm ATTORNEYS.

May 17, 1932;

E. BOLARD EXTENSIBLE SHUTTER Filed April 30, 1931 5 Sheets-Sheet 2 Patented May 17, 1932 PATENT OFFICE EDMOND BOLABD, OF PARIS, FRANCE EXTENSIBLE SHUTTER Applieation flled' April 30, 1931, Serial No. 583,955, and in France June '5, 1980.

This invention is relative to an extensible shutter adapted for various uses and especially suited for the construction of Venetian blinds.

Said shutter is constituted of parallel laths pivotally mounted around likewise parallel axes and'so interconnected as to remain constantly parallel and equidistant when extended or folded, whatever be the angle to which they are turned. 1

The axes of rotation of said laths may comprise rolls, balls or the like, whereby they may roll on and be guided by tracks.

The laths may be interconnected by one or more sets of rods, hinged at their ends and pivoting around the axes of the laths. The interconnection between the laths ensures that when one of these is turned, all others rotate to the same extent.

limiting the scope of the same, various constructional forms of the invention assumed to be applied to a two-sash Venetian blind of a room window.

-. In said drawings:

Fig. 1 is a frontal elevation of the shutter, one of whose sashes is completely extended and the other is partly extended, the laths of both being opened;

Fig. 2 is a corresponding plan view, as seen from below the upper guiding rail;

Fig. 3 is a similar plan view, the laths of both sashes being wholly closed or folded;

Figs. 4 to 6 show diagrammatically various applications of a shutter pursuant to the invention, in which the hatchings indicate zones of shade.

Each sash of the shutter pursuant to the -invention comprises a number of laths 1 suited to the width of opening to be closed and,

to the extent by which the laths are required to overlap each other when closed.

Each lath is free to pivot around axes 4.5 2-2, Whose ends are adapted to slide or roll along fixed rails 3 and 3', for which purpose each axis may have a roll 4 or the like. Stops 5 limit the run of each sash. The axes or pivots 2 of the various laths are interconnected by a series of rods 6 pivot- Attached drawings exemplify, without tical.

otally mounted at 2 and interjointed at their ends 7.

The axes or pivots 2. are likewise intercom nected by a set of rods 6 pivotally mounted at 2 and interhinged at their ends 7.

The fixing members 6 of sets of rods 6 and 6 are rigidly keyed to a vertical bar 8, so that the movements and distortions of both sets of rods 6 and 6 are identical as to time and to scope. Axes or pivots 2-2' thus always remain parallel to bar 8 and are alwa 5 vertical.

lightly above the horizontal plane constituted by the upper edges of laths 1, a second set of rods 9 is arran ed, pivoting around ,axes or pivots 2" and mterhinged at 10. Sets of rods'6 and 9 are interconnected by one hinged bar such as 11, at least, so that vertical plane, one connecting rod 18, at least,

ensures that the movements of aforesaid two sets of rods shall be simultaneous and iden- Said sets of rods 12 and 13 are not indis pensable, but they ensurethat the upper and lower hinged sets function smoothly. I

19 designates an operating handle, mounted upon connecting rod 18. i

The device works as follows:

The shutter (Venetian blind or the like) being in the drawn position (left hand side ofFigs. 1 and 2), pressure upon handle 19 in the direction from right to left or from left to right will cause laths 1 to pivot around their axes 22 until they are at the angle required.

Pressure in the direction from right to left upon the whole of the shutter will cause the various sets of hinged rods (right hand side of Figs. 1 and 2) to fold up, the laths or the shutter to be worked I om within, an appropriate means consisting ofmratchets 20,. Eivoting with rods 8 and carrying with them? xing members 6" of sets of rods (Sand 6', said ratchets being actuated by} means of screws 21.and axlesi22 rotatedby an suitable mechanism, such as handle 23,- or example. a

Reverse movement enables the Venetian blind or the like to be opened, slats 1 unfolding until the, travel of rolls 4 along rail 3' is arrested by stops 5 or by any other limiting device.

Figs. 4 and 5 show how, according tocircumstances, the following alternatives may be made available:-

1. The full sunlightma be allowed to enter the room (left handslde of Fi 4) by turning the laths 1 parallel with "t e suns rays.

2. The rays of the sun may be entirely intercepted (right hand side of Fig. 4) whilst difiused light is admitted inside the room, by

turning the laths 1 perpendicularly to their claim 1 wherein the means for varying the direction as indicated liy A. y

-3. Partly intercept ig. 5) the suns rays by causing laths 1 to rotate by a suitable'angle' aroundtheir axes. The right hand side of Fi '5- shows hows-such angularity of the lat simay be adjusted t inside the room fromflbe n opposite, for example"; the case relatively tof' the left L A. full view'of the-street ma is was I likewise (Fig. '6) -at"gnight,' whilst passers byi'are pr preclude a person seen from a house 7 nd rs of;-

tions airplane hangar doors, sample stands, post-cards and the like and when usedfor sam les they may 'be extended to display goo s to customers and thereafter fold up to avoid congestion. They are likewise rail over ying the ends of the slats, rollers carried by said slats and riding said rail, said rollers having their axes coincident with the axes of ivotal mounting'of the slats, a plu- 'rality 0? bars fixed one to each slat on the pivotal axis thereof, the bars'of adjacent slats aving their ends juxtaposed and hinged together, fixed means for pivotally receiving and holding the bar of one end slat,.means for maintaining the slats parallel to each other, means for varying the incidence of .the slats and for collapsing or extending the shutter, and means for limiting the. distance to which the shutter may be extended. 7 2. An extensible shutter as. claimed in claim 1 havin a plurality of bars fixed one at each end 0 each slat on 'the pivotal axis thereof, and havin fixed means for pivotally receiving and holding the pair of bars of one end slat. 1 3. An extensible shutter as claimed incidence of the slats com rises a plurality of bars successively pivote together at their ends and each'pivotedat a midpoint to'an edge of an adjacent slat.

In testimony whereof I'have signed this specification. V EDMOND BOLARD,

vented 'froxn looking into the room; I It will v 7 be clear that a view may be secured in both I directions; if two sashes are'available.

. It will have been noted frOm Fig. 3 that it r is possible to secure complete darkness.

- It is manifest that, in .all the above alternatives, excepting the last one, full view of the outside is retained from within the room, such ,view being ample and extending throughout the height of the laths and not being, as is the case with known Venetian blinds, limited to a few horilontal slits.

It will likewise be, clear that ample ven- "shutters, awnings, screens, movable part'i.

Q tilationtis'always assured behind thev shutter.

y no 

